>>>One grammar mistake that sets my teeth on edge is the use of you instead of your in situations such as:
>>>
>>>"I'm sure she'll appreciate you thinking of her while she's in surgery". Grrrr....
>>
>>
>>Alan,
>>
>>That doesn't sound wrong to me - but then English is my third language
>>
>>Sounds like short of: I'm sure she'll appreciate that you are thinking of her
>>
>>What is wrong with it ?
>
>Will it be then
>
>
>You're thinking of her ?
>
>Or your thinking of her?
>
>I would assume only these two forms are correct?

It's the context that matters. You're thinking of her is "you are thinking of her" and doesn't fit the context of the statement I posted. "Your" is correct. See my reply to Gregory. If we change the statement to read "She'll appreciate the fact that you are thinking of her..." then substituting "you're" would be correct.